Industrial truck



Dec. 3, 1929.

E. J. ABBE INDUSTRIAL TRUCK Filed Feb. 5, 1927 2 Sheets-Sheet l Dec. 3,1929.

E. J. ABBE INDUSTRIAL TRUCK Filed Feb. 5, 1927 2 Sheets-Sheet 2 Syvumdo@ da/mj QM@ Patented 3, 19,29

,UNITED STATES PATENT OFFICE owner? ar., mann or stavamo, omo, Assmnonfro 'ma nLwELL-ranxnn mo- Tmc comm, .or CLEVELAND, omo, a conroaanon oromo INDUSTRIAL franck appunti@ mea February a, 1927. mm no, icaosr. l

Ipllliisinvention relatesto industrial trucks, particularly to the typeknown as a tier litt truck, which embodies an upright'frame and u carriee suitable for rece1ving a load and M niountc to traversethe frame toreceive or discharge the load at various heights. n, The primary/ohio@ofthe invention is toI provide n truth oli this character, but in whichthe upright tre is tiltable, with `power throwv mi out mechanism .whichshall operate when the carriage has reached a'defnite position relativeto the tramewithont regard'to whether or not the trame is tilted at.this time. v A further obj ect` is to provide a simple it power throwout mechanism which will o erate l'when the upri ht frame has beenti tedto a predetermine position as well' as when the carriage iemoved to.l apredetermined position... i

Furtherohjects and features ot the inven tion will loecome ap arent fromthe follow, g description relatm to the" accompanying drawings., Theessential char' `jteristics are earized in the claims.

' ot an' industria truc with my invention incorporated therewith; Fig. 2is a fragmen tary side elevation similar to Fig. 1 of the om in tiltedposition, the main portion of to the truck trarne. being broken away;Fig. 3 ie a partly diagrammatic view showing the `eelective operatlon'of the hoisting" motor on either of two hoistin drums; Flg. 4 is Yanelectrical dia ram Ae owing a' convenient l tt switch adapta le to myinvention for control- .lin the motor;v

"i n the use of industrialtrnelrs of the tier Ii littvtype it is -hi hlydesirable to limit the,AA

l l movement ot the cad carrier or tier lift carf td nage by a power.throw out mechanism for stopping, or rendering ineffective, the' motorwhich'oerates to raise the carriage. To pro' vide suc a throw out deviceyis comparatively p eiple when the track way for the carriage is rigidon the truck frame. However, when the carrie e track-way is arranged tobe tilted tron le arises in locatin the control.- ling trip or triggerfor operating the power throw out mechanism at any deniteiposi- Wtionand maintaining it in such-position reln the drawin s, Fi 1 is aAsideelevatnionv gardless of the tilting movementot the trachway. Cnc otthe purposes otrriyinvention vis to overcome this dimculty in a simpleand (not shown) A similar truck maybe found j in the prior patent toClyde EQochranNo, 1,538,168yissued May `19, 1925 The power 'for such atruck ma comprise' electric het teries located .in a attery housing 5sur mounting the rear wheels. n operatorie platform is indicated at itAon which the operm ator maystandwithin reach of the various controllevers shownv at the' left hand ci@ Fig. 1.

Intermediately of the twosete of wheels 'is shown a hoisting unit 10comprising a motor 11` and aairfof hoisting Adrinne 12 and 13, one ofwhic l may he arranged to tilt an upright frame 'or traclxway an theother to' `raise or loweraoarrilage guided hy' the frame.,

The upright'frame as shown comprises a4 suitably raced frigid frame 'orlioom'member 15 having rearwardly extendin arms, one bein shown at 16pivoted as at 1 to upstandf ing racketslS on` the'forward end of thev4truck frame 1.` The carriage or tier lift 220 may be mounted onsuitable rollers, such as 21 an'd 22 which ride alon guiding members,such as for example ast e flanges of struc tural'channels or an les com'rising the skeleton of the upright rama. he carriage has aforwardlyextending L shaped platform 23 to engage beneath a load.

The means herein shown for vraising and titl lowering the tier liftcarriage includes the y hoistin mechanism, above mentioned, particular ythe drum 13 about which is wound' a cable, such as 25 passing forwardly.over a sheave 26, thence upwardly to a sheave 2T, surmounting theupright frame, and then downwardly as at a to the carriage 20. rlhemeans for tilting the frame-may comprise a cable attached to the drum 12and passing upwardly over a sheave 31 attached to the upper end of theframe, the outer end of the cable bein secured as at 32 to on the maintruck lframe.

l Convenient means for selectively control! ling the drums 13 and 15from a single motor is shown in my prior Patent No. 1,688,131, issuedOctober 16, 1928. Fig. 3 of thepresent drawings shows the essentialelements of such a control, the drive shaft of the motor 11 beinconnected by a beveled caring 33 to a sli able clutch sleeve 34drivingly rigidI with one.- of the beveled gears. A shaft 35 is drivenwhen the clutch 34 is in one position, the drum 12 being driven througha worin 37 on the shaft meshing with a worm gear 38 o n the drum. Theother drum, namely 13, is similarly driven through shaft'40, worm 41 andworm gear 42. The clutch sleeve 34 may be moved from one position toanother through suitable linkage including a bell crank 43 and link 44near the rear end of the truck. The handle 45 at the very top oi therear portion of the truck frame ma have suitable connections (not shown)with the bell crank 43.

A convenient location for a switch for energizing the motor 11 is nearthe rear of the truck, whereby 'if desired the switch may be easilycontrolled by both hand and pedal operated levers. Such a switch isshown at and may comprise the arrangement of contacts and brushesshownin Fig. 4, hereinafter more fully described. The switch, as shown,has a connection through a link 51 to an arm 52 pivoted at the rear ofthe frame and for the present it may be assumed that this is the onlyoperatorls control for the switch. The switch may comprise a drum,carrying contacts such as 50, 50a', 50", 50c

- and 50". Current may befed'to the contacts 50* and 50b from a powerunit, such as a battery B through conductors 55 and 56. The motor asshown has an armature A fed by current from the battery in a constantdirection regardless of the on position ofgthe switch, while the currentthrough vthe field F may be reversed by manipulation ofV the switch toreverse the direction of rotation of the motor. The field is connected bconductors 57 and 59 to stationary switc contaots 58 and 60, adapted towipe across adj acent pairs of movable contacts 50'-50d and 50-50respectively. The contacts 50a and 50 are shown as electricallyconnected, likewise the contacts 50? and 50d. Contacts 5Ga and 50" arevirtually one contact, broken to provide for cutting-olf power to thearmature in the position of the switch shown, and arranged to feedcurrent delivered from the a hook rigid avenant battery throughconductor 55 to the armature through the conductor 55 from which itreturns to the battery through the conductor 56'.. With this arrangementwhen the drum is rotated to the left current will iow through the lieldin one direction, and it may be assumed that this will drive the motorto raise the carriage or tilt the upright frame, depending on which oneofthe worm and gear mechanisms is rendered active through the clutchsleeve 34. lf the drinn is rotated in the opposite directions namely,clockwise, current will liow through the field in the opposite'direction for either returning the frame to upright'position or forlowering the tier lift carriage. When the druni is in the position inFig. 4, the motor will be idle.

The kick-oh or power throw out arrapgement comprises a forwardlyextending ink 62 pivotally connected at one end, as at 61, with theswitch drum and supported at its other endby a depending lever 63.Slidably pivoted to this lever 63 is another link 64 extending forwardlyto a short depending arm 65 to which arm the frontend of the link 64 ispivoted at 66 coaxially with the pivot of the upright frame 15. In orderthat the upri ht frame when rotated about its pivot tot e left mayoperate the links 62 and 64 to throw of? the power l provide a collar 67rigid on the link 64, a sleeve 68 slidable on the link 64, and a link 69pivotally attached as at 69 to the member 16 of the frame 15 andconnected with the sleeve. As the traine 15 is tilted as above mentionedthe sleeve slides alon the link 64 until it engages the collar ,67 wereupon an abutment 64 on the ,link 64 engages the arm 63 and thruststhe link 62 rearwardly, returning the switch to the od position as shownin Fig. 4.

To enable the carriage to throw ed' the power through the same linkage,62 and 64, I provide a bell crank 70, pivoted as at 71 to the side ofthe frame 15 and connected by u link 72 to the short depending arm 65,and a link 73 extending upwardly from the bell crank to a bail 75pivoted as at 76 to the sides of the frame 15. The bail normally restson pins 7 8 (one being shown) rigid with the frame. The transverselyextending portion 7 5a ofthe bail is positioned vin the path of theroller 21 and when the carriage 20, carrying this roller, is hoisted toits highest allowable position it will rotate the bail about its pivotand, through the linkage described, throw the switch to oi position.

As will be seen from Fig. 2 the frame 15 may tilt without moving thecontrol links 62 and 64 until the sleeve 68 contacts with the collar67.It follows that the frame 15 may be tilted considerably and the carriagethen hoisted, but the point in the travel of the carriage at which theower is thrown o will be the same as if the rame were upright.

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@t tn n 'Kt/emette9 nn npttght ptoted ttnetn tney? o toed engngtnqgmemtoet mounted to 'ttmetee the tt"nuetmtny9 potten hoist tmtdnp;eonneetono with the ttodtttmjp to titt tt ond eonneotitono with theeotdmemtoet to ennee onen ttewetsing movement, meonnmsm to intelet'nptthe onploty ot ponen to the ttoiot, e tint". opetntivety connected tothe meetmntsnn exams eotnoted by the toed engegtng mem-- toet' whenmoved to n loredetetmtned position, said menne being; positivelyeonneeted to mid link, ond o nnannoetnl attached to the tm'ct` WWW seidmemtoet being stidotbty Supported tot? the tindt end ott'nnged to engogeen etant ment on solid tinln Wneteby tttting ot the trackway to apredetermined position actuates the power interrupting mechanism. Y10.-In a truck, a frame, a tiltable track- .Way pivoted at one endthereof, electrically 5 oserated hoisting mechanism rigidly mounte onthe truck frame, connections therefrom to tilt the trackway, a carriagemounted to traverse the trackway, connections between -thehoisting'mechanism and carriage lo to eiect such traversing movement, acontrol switch manually operable to energize the motor of the hoistinmechanism, a rod connected with the switc at one end and pivotedcoaxially with the boom at the other end, carriage engaging means on thetrackway and connections between said means and the pivoted end of thecontrol rod for throwing the switch to off positionwhen the carria ereaches a predetermined position on ige trackway. 11. Icombination witha truck, a frame,- a power operated hoisting unit -mounted thereoncarrying two drums, a tiltable trafckway mounted on said frame, meansconnct- 'ing the trackway to one of said drums for tilting the trackway,a carriage mounted'gto traverse the trackway, and means connecting thecarriage with the other of said hoisting drums to .raise the carriage,manual means for throwing on the power to drive said dru'ms and meanscontrolled either by a given tilting movement of the trackway, or agiven raising movement of the platform for throwinglput said power.testimony whereof, I hereunto ailix iny signature. f

EDWARD J. ABBE.

